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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================
#ifndef DMETIMEFRAME_H
#define DMETIMEFRAME_H
#ifdef _WIN32
#pragma once
#endif
#include "datamodel/dmelement.h"
#include "movieobjects/timeutils.h"
//-----------------------------------------------------------------------------
// Time classes used to help disambiguate between local + parent time
//-----------------------------------------------------------------------------
typedef int LocalTime_t;
typedef int ParentTime_t;
class CDmeTimeFrame : public CDmElement
{
DEFINE_ELEMENT( CDmeTimeFrame, CDmElement );
public:
// Methods of IDmElement
virtual void OnAttributeChanged( CDmAttribute *pAttribute );
DmeTime_t ToChildMediaTime( DmeTime_t t, bool bClamp = true ) const;
DmeTime_t FromChildMediaTime( DmeTime_t t, bool bClamp = true ) const;
DmeTime_t ToChildMediaDuration( DmeTime_t dt ) const;
DmeTime_t FromChildMediaDuration( DmeTime_t dt ) const;
DmeTime_t GetStartTime() const;
DmeTime_t GetDuration() const;
DmeTime_t GetTimeOffset() const;
float GetTimeScale() const;
DmeTime_t GetStartInChildMediaTime() const;
DmeTime_t GetEndInChildMediaTime() const;
void SetStartTime( DmeTime_t startTime );
void SetDuration( DmeTime_t duration );
void SetTimeOffset( DmeTime_t offset );
void SetTimeScale( float flScale );
void SetEndTime( DmeTime_t endTime, bool bChangeDuration );
void SetTimeScale( float flScale, DmeTime_t scaleCenter, bool bChangeDuration );
private:
CDmaVar< int > m_Start;
CDmaVar< int > m_Duration;
CDmaVar< int > m_Offset;
CDmaVar< float > m_Scale;
};
//-----------------------------------------------------------------------------
// inline methods
//-----------------------------------------------------------------------------
inline DmeTime_t CDmeTimeFrame::GetStartTime() const
{
return DmeTime_t( m_Start );
}
inline DmeTime_t CDmeTimeFrame::GetDuration() const
{
return DmeTime_t( m_Duration );
}
inline DmeTime_t CDmeTimeFrame::GetTimeOffset() const
{
return DmeTime_t( m_Offset );
}
inline float CDmeTimeFrame::GetTimeScale() const
{
return m_Scale;
}
inline void CDmeTimeFrame::SetStartTime( DmeTime_t flStartTime )
{
m_Start = flStartTime.GetTenthsOfMS();
}
inline void CDmeTimeFrame::SetDuration( DmeTime_t flDuration )
{
Assert( m_Duration >= 0 ); // if you want a reversed clip, set the timescale negative
m_Duration = flDuration.GetTenthsOfMS();
}
inline void CDmeTimeFrame::SetTimeOffset( DmeTime_t flOffset )
{
m_Offset = flOffset.GetTenthsOfMS();
}
inline void CDmeTimeFrame::SetTimeScale( float flScale )
{
m_Scale = flScale;
}
//-----------------------------------------------------------------------------
// Convert back + forth between my media time and child media time
//-----------------------------------------------------------------------------
inline DmeTime_t CDmeTimeFrame::ToChildMediaTime( DmeTime_t t, bool bClamp ) const
{
t -= DmeTime_t( m_Start );
if ( bClamp )
{
t.Clamp( DMETIME_ZERO, DmeTime_t( m_Duration ) );
}
return ( t + DmeTime_t( m_Offset ) ) * m_Scale;
}
inline DmeTime_t CDmeTimeFrame::FromChildMediaTime( DmeTime_t t, bool bClamp ) const
{
t = DmeTime_t( t ) / m_Scale - DmeTime_t( m_Offset );
if ( bClamp )
{
t.Clamp( DMETIME_ZERO, DmeTime_t( m_Duration ) );
}
return t + DmeTime_t( m_Start );
}
inline DmeTime_t CDmeTimeFrame::ToChildMediaDuration( DmeTime_t dt ) const
{
return dt * m_Scale;
}
inline DmeTime_t CDmeTimeFrame::FromChildMediaDuration( DmeTime_t dt ) const
{
return dt / m_Scale;
}
inline DmeTime_t CDmeTimeFrame::GetStartInChildMediaTime() const
{
DmeTime_t time = DmeTime_t( m_Offset ) * m_Scale;
Assert( time == ToChildMediaTime( GetStartTime() ) );
return time;
}
inline DmeTime_t CDmeTimeFrame::GetEndInChildMediaTime() const
{
DmeTime_t time = DmeTime_t( m_Offset + m_Duration ) * m_Scale;
Assert( time == ToChildMediaTime( GetStartTime() + GetDuration() ) );
return time;
}
#endif // DMETIMEFRAME_H
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